SHL Series Double-Drum Water-Tube Chain Grate Boiler

SHL Series Double-Drum Water-Tube Chain Grate BoilerThe SHL series boiler is a new generation of high-capacity, field-assembled, coal-fired water-tube boiler, available for both st...

Evaporation Capacity: 20 - 75 t/h
Steam Pressure: 1.6 / 2.5 MPa
Thermal Efficiency: 81.2% - 82.77%
Effective Grate Area: 22.6 - 71.25 m²
Fuel: Class II Bituminous Coal

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SHL Series Double-Drum Water-Tube Chain Grate Boiler

The SHL series boiler is a new generation of high-capacity, field-assembled, coal-fired water-tube boiler, available for both steam and hot water generation. Developed through extensive research and collaboration with leading institutions, this series is engineered to meet national energy policies and the large-scale central heating demands of modern industries. It stands out for its high thermal efficiency, robust power output, and exceptional load adaptability. The sophisticated design ensures a high degree of operational automation, safety, and reliability.

Key Structural and Performance Features

Advanced Double-Drum Design: The boiler features a double-drum, horizontal layout with a natural circulation water-tube system. This structure optimizes heat transfer and ensures stable operation under varying loads.
High-Efficiency Combustion System: Equipped with a reliable chain grate stoker, the combustion system is designed for bituminous coal. It utilizes independent air chambers and dual-side air intake, allowing for precise combustion control. The rationalized design of the front and rear arches ensures complete fuel burnout and wide adaptability to different coal types.
Mechanized and Automated Operation: The entire system is engineered for mechanization, incorporating essential auxiliary equipment such as an economizer, air preheater, forced draft fan, induced draft fan, gearbox, and dust collection systems. This is complemented by a comprehensive electrical control panel with interlock protection and alarm systems for over-temperature and over-pressure, achieving a high level of automation.
Compact and Efficient Structure: Despite its large capacity, the overall structure is relatively compact. The efficient layout of heating surfaces, including the main furnace, superheater, and economizer, maximizes thermal efficiency while minimizing footprint.

Main Technical Parameters

The SHL series offers a wide range of models to suit diverse industrial needs. The detailed technical specifications are outlined in the table below, covering capacities from 20 to 75 t/h.

Item	SHL20-1.6-AII SHL20-2.5-AII	SHL25-1.6-AII SHL25-2.5-AII	SHL30-1.6-AII SHL30-2.5-AII	SHL35-1.6-AII SHL35-2.5-AII	SHL40-1.6-AII SHL40-2.5-AII	SHL75-1.6-AII SHL75-2.5-AII
Rated Steam Capacity (t/h)	20	25	30	35	40	75
Rated Pressure (MPa)	1.6 / 2.5
Feedwater / Saturated Steam Temp (°C)	104 / 204/226/400
Boiler Thermal Efficiency (%)	82.77	82.2	82.38	82	82.4	81.2
Main Body Heating Surface (m²)	458	526.2	550	573.6	610.9	1172.7
Superheater Area (m²)	154	157	159	176	189	365
Economizer Area (m²)	446	307.8	307.8	338	359	639.7
Air Preheater Area (m²)	440	557	537	588.6	628.6	1158
Design Coal Type	II Class Bituminous Coal
Combustion Method	Chain Grate Stoker
Effective Grate Area (m²)	22.6	28.85	30.1	32.5	35.1	71.25
Max Transport Height (mm)	10450	10450	10800	10800	10800	13500
Min Boiler Room Height (mm)	11350	11350	11750	11750	11750	15708
Overall Width (mm)	4220	4970	5080	5450	5820	9760
Overall Length (mm)	4970	5710	9695	9695	9695	11950

Note: The product performance and technical parameters listed are subject to change. All specifications are finalized based on the official ex-factory technical documentation.